Swinging treadle



(No Model.) 2 Sheets- Sheet 1.

0. H. GENTRY.

i SWINGING TRBADLE. y

No. 380,029. 4 Patented Mar. 27,11888.

l O I A l l. I l

UNITED STATES IPIYIENT OFFICE.

OLIVER H. GENTRY, or OPELOUSAS, LOUISIANA.

SWINGING TREADLE.

SPECIFICATION' forming pari: o Letters Patent N o. 380,029, dated March27, 1888.

Application filed December 2, 1887. Serial No. 256,823. (No model.)

- full, clear, and exact description yof the inven- 1 tion, such as willenable others skilled in the art to which it appertains to make andusethe same. A

lVIy invention relates to certain new and useful Improvements inswinging treadles for sew- Ing-machines or other mechanism requiringpower.

It consists of a swinging lever adjustably connected to one or moreswinging arms, that are in turn connected to a crank-arm of a revolvingshaft or to a crank-pin on drive-wheel,

or connected in any other suitable manner to mechanism to which it isdesirable to impart motion.

The object of my invention is to impart motion to machines by means of aswinging footlever, one or more swinging arms, and suitable connections.I attainthis object by means of the peculiar construction andarrangement of the various parts of my device, which will be more fullypointed ont and described in the specification and claim, referencebeing had to the drawings accompanying this application and forming partof the same, in which- Figure 1 is a View of my invention taken from theend of the sewing-machine. Fig. 2 is a front elevation, and Figs. 3 and4 are detail views.

Similar letters refer to like parts throughout the drawings.

Referring to the drawings, A represents a sewing-machine frame, and Bthe bed or table.

C represents the drive-wheel, and D the belt.

which connects with sewing-machine. (N ot shown.) Metal plates E and Eare formed with inwardlyinclined end projections, a, adapted to fittightly the edges of table B. Their opposite ends are formed withright-angular projecting lugs b, having perforations b', through whichis passed a screw-bolt, c, and by means of which said plates are drawntightly against the edges of table B, and are thus held rigidly in placeto the under face of said table. Near the end of plate E a projectingear or lug, d, is secured to its under face. Said lug is provided with aperforation, d', to receive pivot-holte. A swing-arm, F, is pivoted tolug d by bolt e and projects downward, and 'its lower end is perforatedto receive bolt f. The upper portion of said arm is provided with aslot, g, adapted to receive a set-screw bolt, h. The lower end of arm Fis pivoted to one end of pitman-rod G, andthe opposite end of said rod Gis perforated to receive crank-pin z', which is formed on crank-arm H,that is secured to shaft H', on which is secured` drivewheel C. Y

Plate E is formed'with a dovetail-shaped slot, j, extending inward fromits outerend, said slot being adapted to` receive and hold loosely anear-piece, 7c, which is formed with an extension, k', having aperforation to receive a thumb screw bolt, k2, by means of which saidearpiece may be held at any desired position within the slotj. Aperforation is formed in the ear-piece k, and a bolt, Z, is inserted, towhich the lever I is connected at one end, and the opposite end isprovided with a footpiece, J.

' The upper end of lever I is slotted to receive l set-screw m, to whichis pivoted one end ofthe connecting-rod K, and the opposite end of saidrod is perforated to receive screw-bolt h. The center of saidconnecting-rod K is formed with holes n and made to lap over, and isheld by set-screw o, that passes through said holes when they register,the purpose being to lengthen or shorten said rod K when desired toconform to the change of the position of the ear k, holding the end oflever I, as shown in Fig. 1. A similar construction is used when twlevers are 'connected to the ears k, as shown in Fig. 2, the foot-pieceJ extending across and joining the lower end of each of said levers. v

In the detailview, Fig. 3, the inclined groov or slot j is shown, andFig. 4 represents the beveled edges of the ear-piece 7c. This conpowerto operate.

i struction herein described, though shown and IOO rfhe operation of mydevice is obvious and pivoted at `one end to the free end of said needsno description. f swing-arm and its opposite end to a crank-pin,

Having thus described my invention, what I and a foot-board on the freeend of said lever, claim, and desire to secure by Letters Patent,substantially as set forth.

5 is In testimony whereof Iafx my signature in I5 A swinging treadleconsisting of a slotted presence of two witnesses. lever pvoted to ahorizontally-adj ustable lug, OLIVER H. GENTRY. a slotted swing-armpivoted to a rigid lug, said Witnesses: lever and arm connected at theirslotted p0r- ROBT. H. BRADFORD,

1o tions by an adjustable rod7 a connecting-rod GEO. K. BRADFORD.

